Improvement in sawing-machines



F. W. KROGH.

SAWING-MACHINE.

No.188,15Z. Patented March 6,1877.

N-PEI'ERS. PIlOTO-UTHOGHAPHER, WABMINGYON. D c.

UNITED STATES PATENT QFFIOE.

FERDINAND W. KROGH, OF TULARE, CALIFORNIA.

IMPROVEMENT IN SAWlNG-MACHINES.

Specification forming part of Letters Patent No. 188,152, dated March 6,1877; application filed December 2, 1876.

To all whom it may concern:

Be it known that I, FERDINAND W. KROGH, of Tulare city, county ofTulare, and State of California, have invented an Improvement inSawing-Machines and I do hereby declare the following to be a full,clear, and exact description thereof, reference being had to theaccompanying drawings.

My invention relates to a novel portable device for sawing logs andheavy timber, and working upon uneven ground, and in places which aredifficult of access.

The details of my invention will be completely described by referenpe tothe accompanying drawings, in which- A is a triangular frame, mountedupon suitable wheels, so that it can be easily drawn from place toplace. It is made to rest upon the three wheels, in order to accommodateit to uneven surfaces in such places as are most likely to be occupiedby fallen trees. The standards or supports B are mounted transverselyupon the frame A to carry the shaft 0. This shaft has a balance andcrank wheel, D, secured to one end, and is made extensible at the otherend, as will be more fully described hereafter. Upon the shaft (J, justinside of the wheel D, is secured an eccentric, E; and the pitman F,which has the saw G attached to its outer end, is slotted so as to fitover this eccentric, as shown.

The connecting-rod H extends from the crank upon the wheel D to thepitman, where it is attached, as shown, and by its motion gives thepitman and saw the necessary throw; The slot in the pitman is made longenough to accommodate the throw of the crank, and by the action of thecam the pitman will be alternately elevated and depressed, so as to givea rocking motion to the saw in its alternate strokes, similar to thatemployed in hand sawing. A guide, I, clasps the saw-back, so that itslides easily through it, but is prevented from tipping to one side orthe other. This guide is secured to arms J which extend to and clasp theshaft, and. by means of a rope, K, passing over the arm L, I am enabledto raise the saw and guide at any time, so as to be clear of the logwhile the device is moved to another point.

When in use the guide is secured to the log by a spike, M, and the frameA is held stationary by means of pins N, driven into the ground. Theshaft 0 is flattened or otherwise fitted to receive an extension, 0,with the crank or other driving power, so that it may be driven from anydistance rendered necessary by obstruction, while a universal joint nearthe journal allows of a change of direction for the same purpose.

The operation will be as follows: The saw and pitman being raised by therope, the frame is moved forward on its wheels parallel with the log ortree to be cut, and when the proper point is reached the frame issecured by the pins N. The saw pitman and guides being next lowered tothe log, the guide is secured by driving the pin or spike M into thelog, and this steadies the whole and prevents vibration.

By this construction the sawing-frame can always be supported solidly atany point upon inclined or uneven ground, the motion of the saw itselfwill be steady, and by the action of the cam the most favorable movementfor rapid cutting will be given it.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- The frame A, with its fastening-pins N,mounted upon three wheels, having the saw G so mounted as to be operatedat right angles with the line of travel by means of the pitman F, crankwheel and connecting-rod, and guide I, connected with the shaft 0 bymeans of the arms J, all constructed to operate substantially asdescribed.

In witness whereof I have hereunto set my hand and seal.

FERDINAND w. KROGH. n s. j

Witnesses:

O. T. STACY, FRANK A. Bnooxs.

